Some standard content:
ICS37.040.20
Registration No. 411—1997
Chemical Industry Standard of the People's Republic of China
HG/T2907—1997
idtISO3772:1991(E)
Dimensions of roll film for photocomposition
Photography-Film dimensions-Rolls for photocompositionPublished on 1997-05-23
Ministry of Chemical Industry of the People's Republic of China
Implementation on 1997-10-01
HG/T2907—1997
This standard is equivalent to ISO3772:1991(E) "Dimensions of roll film for photocomposition", with the following difference: one international standard number that has been converted into my country's standard has been changed in the referenced standard. As of the date of publication of this standard, the contents of ZBG81003-88 and HG/T2172-91 on the size of reel film for phototypesetting shall be abolished.
Appendices A, B and C of this standard are all indicative appendices. This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry. This standard is under the jurisdiction of China Lucky Film Company, the technical unit responsible for the standardization of photosensitive materials of the Ministry of Chemical Industry. The responsible drafting unit of this standard: China Lucky Film Company The participating drafting units of this standard: China Lucky Film Group Chemical Industry Department Second Film Factory, Gongyuan Photosensitive Materials Industry Company Black and White Film Factory China Printing and Equipment Industry Association, the drafters of this standard: Wang Ronghua, Wang Lei, Huang Linwei, Zhang Boling, HG/T2907-1997
ISO Former
TSO (International Organization for Standardization) is a worldwide joint organization of national standard groups (ISO member groups): the work of formulating international standards is usually completed through ISO technical committees. Each member group interested in a subject for which a technical committee has been established has the right to participate in the technical committee. Governmental and non-governmental international organizations may also participate in the work after contacting ISO. ISO works closely with the International Electrotechnical Commission (TEC) on all matters of electrotechnical standardization. Draft international standards confirmed by the technical committee are circulated to the member groups for voting. At least 75% of the members participating in the vote must approve them before they can be published as international standards. International Standard ISO3772 was developed by ISO/TC42 Technical Committee on Photography. This second edition abolishes and replaces the first edition (ISO3772:1976) and has been technically revised. Appendices A, B, and C of this international standard are informative appendices. HG/T2907-1997
The rapid development of phototypesetting technology and the lack of authoritative national standards have led to a surge in the specifications of equipment and photographic products. In order to minimize this surge and promote the reduction of the total number of film specifications currently in use, this international standard lists recommended and recognized film sizes. It is expected that with the cooperation of photographic product and equipment manufacturers, the recognized sizes can be cancelled and only the recommended sizes can be used. However, since this is a booming industry, the criteria for calculating new film sizes that may be required for future changes have been determined. Chemical Industry Standard of the People's Republic of China
Dimensions of roll film for photocomposition
IIG / T 2907 — 1997
idt ISO 3772 : 1991 (E)
Photography-Film dimensions-Rolls for photocompositionScope
This standard specifies the nominal width and cutting width and their limit deviations of roll photographic film for photocomposition equipment. It also specifies the recommended core size, winding direction and packaging markings. The film length is not specified, but Appendix A gives a series of nominal film lengths for the guidance of equipment manufacturers. This standard is designed for unperforated film. However, as some older equipment still requires perforated film, Appendix B gives the perforation specifications and actively encourages equipment manufacturers to use only unperforated roll film when designing new equipment. This standard mainly uses metric units.
2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards. HG/T2909-1997 Dimensions of roll paper for phototypesetting (id1 ISO6408:1991) IS01:1975 Standard reference temperature for industrial length measurement IS0554:1976 Standard atmosphere for conditioning and/or testing - Specifications 3 Conditions for measuring dimensions
The dimensions and limit deviations specified in this standard apply to measurements made during manufacture in accordance with IS0 554l (see Appendix C) under atmospheric conditions of temperature (23±2) and relative humidity (50±5)%. 4 Roll width
4.1 Recommended width
The recommended cutting width and its limit deviations shall conform to the values given in Table 1 1) All roll cutting instruments shall be calibrated at a temperature of 20°C (as specified in ISO1) and a relative humidity of 50%. Approved by the Ministry of Chemical Industry of the People's Republic of China on May 23, 1997 and implemented on October 1, 1997
Nominal width
4.2 Approved width
IIG / T 2907—1997
Table 1 Recommended roll film widths
Cutting width
The provisionally approved cutting widths and their limit deviations shall conform to the values given in Table 2 Table 2 Approved roll film widths
Nominal width
Cutting width
Limit deviation
± 0. 350
Limit deviation
±0, 12
However, manufacturers of phototypesetting equipment are strongly encouraged to use only the recommended widths given in Table 1 in the design of their future equipment2
4.3 Rules for cutting and extreme deviations
HG/ T 2907 —1997
The rules for the cutting tolerances and limit deviations of roll film are listed in Table 3. Table 3 Rules for cutting and limit deviations of roll film Nominal width
>120～≤260
5 Roll length
Cut width
Nominal value-0.12
Nominal value-0.25
Nominal value-0.50
The actual usable length of roll film should not be shorter than the nominal length. The nominal film length is not specified (see Appendix A). 6 Joints
Reel film for phototypesetting shall not have joints. 7 Core
7.1 Core length
The core length should be equal to the minimum width of the film, and its limit deviation is -%. 7.2 Core inner diameter
The recommended core inner diameter is 50.7mm±0.3mm, but two other diameters are also recognized: 28.8mm±0.3mm and 71.9mm±0.5mm8. Perforated film
Limit deviation
Although new equipment is designed for non-perforated film, some existing equipment still requires perforated film (see Appendix B). 9 Winding
It is recommended that the film be wound on the core with the photosensitive side facing inward. If it must be wound in a non-standard manner with the photosensitive side facing outward, this should be clearly marked on the packaging.
It is recommended that the film is not fixed on the core. However, for applications that require reverse operation, the film can be fixed on the core with a pressure-sensitive adhesive tape and marked on the packaging.
It is recommended that when the film is wound on the core, the indentation of the core is symmetrical relative to the film on the roll. Never make one side of the core concave or convex.
"The actual roll width, including the lateral roll deviation, should not exceed the maximum film cutting width plus 1mm10 packaging mark
10.1 Information
Sufficient information should be given on the packaging to ensure the correct use of the product. The packaging should indicate:
a) product name and specifications;
conditions of use (such as safety lights);
transportation and storage conditions
HG / T 2907 —1997
Any given level of packaging shall meet one or more of the above requirements and shall therefore be identified using the appropriate of the following items:-Name or trade name of the product;
Name or trademark of the manufacturer;
A manufacturer's catalogue identification number; Bar code information, if applicable;
Number of units contained in the package:
-Nominal width and length in metric units, with width written first; Batch number and/or original reel number:
Warranty period or "last development date" or inventory control code; Manufacturer's recommended safe lighting conditions:wwW.bzxz.Net
Manufacturer's recommended storage conditions";
-Marking for non-standard winding, if applicable2》3):-Marking for film fixed to the reel core, if applicable3); Marking for perforated film, if applicable3).
Conformity
If it is desired to indicate that a product conforms to this standard, the following wording shall be used: *Conforms to HG/T Xxxx一XXXX\.
2) Under the condition of recommended residual light (excluding total darkness), this item should be clearly written on the unit package. 3) It can be marked with words or codes
Customer standard industry information free download appendix (suggested appendix)
Nominal film length
Due to the different thickness of the support used, the permitted film length is different, so the nominal film length is not specified. However, in order to guide equipment manufacturers to design future equipment, the following is given Recommended lengths: 30m, 45m, 60m, 120m.
Appendix B (suggestive appendix)
Perforated film
B.1 Although new equipment is designed based on non-perforated film, some existing equipment still requires perforated film. Film with holes on both sides can be found in the following widths:
70mm;76.2mm(3in);100mm;127mm(3in);150mm;200mm;250mm:254mm(10 in); 310 mm.
Single-sided perforations are found in the following widths: 101.6 mm (4 in); 152.4 mm (6 in); 203.2 mm (8 in); 254 mm (10 in)B.2 Due to the fragile nature of film, perforations on one side may cause the film to wrinkle in the machine. Film perforated on both sides may have skewed perforations, which may result in the perforations not being arranged in a straight line. For film with a roll width exceeding 130 m2, the position of the second row of perforations should avoid problems caused by changes in the film size due to aging and temporary shrinkage. B,3 Perforations on both sides of the film should conform to the dimensions shown in Figure B.1 and specified in Table B.1. 000009
Figure B.1 Dimensions of roll film for phototypesetting
Table B.1 Perforation dimensions (now Figure B.1)
Cut width (see Table! , Table 2)
4.75±0.03
2. 80± 0. 03
1. 98± 0. 03
2. 00± 0. 2.5
L(100 consecutive hole spacings)
475±0.40
0.50Nominal
When A250
When A2250
Cut B.1 (End)
0.25Maximum
0.50Maximum
The distance M between the holes punched on both sides is not specified to avoid problems caused by double dimensions and accumulated limit deviations. If required by design, the dimensions and their related limit deviations can be derived from the data listed in Table B.1 using the following relationship: MA-2(C+E)
B.4The dimensions specified in Table B.1 are similar to the P-type holes shown in HG/T2695--95. However, the dimensional limit deviations of some parameters are larger than those given in HG/T2695--95.
Films for phototypesetting must have these larger limit deviations because most specifications are relatively wide. At these widths, the film support is not absolutely flat or difficult to bend. Therefore, these films require larger dimensional limit deviations during manufacturing operations. Because these dimensional limit deviations are relatively large, it is recommended to use film edge guides next to the holes when designing equipment, and not to use sprockets to match the guides in the holes. Because the margin dimension E between the hole edge and the film edge has a large limit deviation, the sprocket tooth width should be designed to be narrower than the hole width C. For films with holes on both sides, the sprocket teeth should be designed more precisely. It is usually used to drive the film edge opposite the guide edge. The margin dimension E must be considered during the design, and the cross-span dimension M between the holes must also be considered. B.5 For films with single-sided holes, it is recommended to wind in the winding direction A described in GB6850-86, as shown in Figure B.2, with the photosensitive surface inside.
B.6 References
HG2695--95 Movie film dimensions
Figure B.2 Winding direction A
GB6850-86 Minimum content requirements for unexposed movie film box labels Appendix ℃ (suggestive appendix)
Dimensional stability
The specified dimensional limit deviations apply to the time of film manufacturing and should be measured after equilibrium under the standard atmospheric temperature (23±2)℃ and relative humidity (505)% specified in ISO554. These dimensions may change with permanent aging shrinkage and temporary shrinkage or expansion caused by changes in environmental moisture content and temperature. In the positive tape case, dimensionally stable films are used for phototypesetting. During the warranty period of the film, the film dimensions when the package is opened under the same environmental conditions as when it was manufactured should not differ by more than +0.02% to -0.04% from the dimensions when it was manufactured.1 The dimensions specified are similar to the P-type holes shown in HG/T2695--95. However, the dimensional limit deviations of some parameters are larger than those given in HG/T2695--95.
Phototypesetting films must have these larger limit deviations because most specifications are relatively wide. At these widths, the film support is not absolutely flat or difficult to bend. Therefore, these films require larger dimensional limit deviations during manufacturing operations. Because these dimensional limit deviations are relatively large, it is recommended to use the edge guide next to the hole when designing the equipment, and not to use a sprocket to match the guide in the hole. Because the margin dimension E between the hole edge and the edge of the film has a large limit deviation, the sprocket tooth width should be designed to be narrower than the hole width C. For films with holes along both sides, the sprocket teeth should be designed more precisely. It is usually used to drive the edge of the film opposite the guide edge. The margin dimension E must be considered during design, and the cross-span dimension M between the holes must also be considered. B.5 For films perforated on one side, it is recommended to be wound in the winding direction A as described in GB6850--86, as shown in Figure B.2, with the photosensitive surface facing inward.
B.6 References
HG2695--95 Motion Picture Film Dimensions
Figure B.2 Winding Direction A
GB6850--86 Minimum Contents of Unexposed Motion Picture Film Box Label Appendix ℃ (Indicative Appendix)
Dimensional Stability
The specified dimensional limit deviations apply to the time of film manufacture and should be measured after equilibrium under the standard atmospheric temperature (23±2)℃ and relative humidity (505)% specified in ISO554. These dimensions may change with permanent aging shrinkage and temporary shrinkage or expansion caused by changes in ambient moisture content and temperature. In the positive belt, dimensionally stable films are used for phototypesetting. During the warranty period of the film, the film size when opened under the same environmental conditions as when manufactured should not differ by more than +0.02% to -0.04% from the size when manufactured.1 The dimensions specified are similar to the P-type holes shown in HG/T2695--95. However, the dimensional limit deviations of some parameters are larger than those given in HG/T2695--95.
Phototypesetting films must have these larger limit deviations because most specifications are relatively wide. At these widths, the film support is not absolutely flat or difficult to bend. Therefore, these films require larger dimensional limit deviations during manufacturing operations. Because these dimensional limit deviations are relatively large, it is recommended to use the film edge guide next to the hole when designing the equipment, and not to use sprockets to match the guides in the holes. Because the margin dimension E between the hole edge and the film edge has a large limit deviation, the sprocket tooth width should be designed to be narrower than the hole width C. For films with holes along both sides, the sprocket teeth should be designed more precisely. It is usually used to drive the film edge opposite the guide edge. The margin dimension E must be considered during design, and the cross-span dimension M between the holes must also be considered. B.5 For films perforated on one side, it is recommended to be wound in the winding direction A as described in GB6850-86, as shown in Figure B.2, with the photosensitive surface facing inwards.
B.6 References
HG2695-95 Motion Picture Film Dimensions
Figure B.2 Winding Direction A
GB6850-86 Minimum Contents of Unexposed Motion Picture Film Box Label Appendix ℃ (Indicative Appendix)
Dimensional Stability
The specified dimensional limit deviations apply to the time of film manufacture and should be measured after equilibrium under the standard atmospheric temperature (23±2)℃ and relative humidity (505)% specified in ISO554. These dimensions may change with permanent aging shrinkage and temporary shrinkage or expansion caused by changes in ambient moisture content and temperature. In the positive belt, dimensionally stable films are used for phototypesetting. During the warranty period of the film, the film size when opened under the same environmental conditions as when manufactured should not differ by more than +0.02% to -0.04% from the size when manufactured.
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